<?php
class navModel extends Model{
	private $tb = 'nav';

	public function __construct(){
		parent::__construct($this->tb);
	}

	private function _valid($data,$type){
	
	}

	public function add_nav($data){
	
	}

	public function edit_nav($id, $data){
	
	}

	public function del_nav($id){
	
	}
}
